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123 lines
3.4 KiB
123 lines
3.4 KiB
/* Test dwfl_linux_proc_attach works without any modules.
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Copyright (C) 2015 Red Hat, Inc.
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This file is part of elfutils.
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This file is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <unistd.h>
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#ifdef __linux__
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <sys/user.h>
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#include <fcntl.h>
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#include <string.h>
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#include ELFUTILS_HEADER(dwfl)
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#include <pthread.h>
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#endif
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#include "system.h"
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#ifndef __linux__
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int
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main (int argc __attribute__ ((unused)), char **argv __attribute__ ((unused)))
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{
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printf ("dwfl_linux_proc_attach unsupported.\n");
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return 77;
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}
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#else /* __linux__ */
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static pthread_t thread1;
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static pthread_t thread2;
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static void *
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sleeper (void* d __attribute__ ((unused)))
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{
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sleep (60);
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return NULL;
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}
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static char *debuginfo_path = NULL;
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static const Dwfl_Callbacks proc_callbacks =
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{
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.find_elf = dwfl_linux_proc_find_elf,
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.find_debuginfo = dwfl_standard_find_debuginfo,
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.debuginfo_path = &debuginfo_path,
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};
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static int
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thread_callback (Dwfl_Thread *thread, void *thread_arg)
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{
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int *threads = (int *) thread_arg;
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pid_t tid = dwfl_thread_tid (thread);
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printf ("thread tid: %d\n", tid);
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(*threads)++;
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return DWARF_CB_OK;
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}
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int
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main (int argc __attribute__ ((unused)),
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char **argv __attribute__ ((unused)))
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{
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/* Create two extra threads to iterate through. */
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int err;
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if ((err = pthread_create (&thread1, NULL, sleeper, NULL)) != 0)
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error (-1, err, "Couldn't create thread1");
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if ((err = pthread_create (&thread2, NULL, sleeper, NULL)) != 0)
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error (-1, err, "Couldn't create thread2");
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Dwfl *dwfl = dwfl_begin (&proc_callbacks);
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if (dwfl == NULL)
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error (-1, 0, "dwfl_begin: %s", dwfl_errmsg (-1));
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pid_t pid = getpid ();
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/* This used to fail, since we don't have any modules yet. */
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if (dwfl_linux_proc_attach (dwfl, pid, false) < 0)
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error (-1, 0, "dwfl_linux_proc_attach pid %d: %s", pid,
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dwfl_errmsg (-1));
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/* Did we see all 3 threads? */
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int threads = 0;
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if (dwfl_getthreads (dwfl, thread_callback, &threads) != DWARF_CB_OK)
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error (-1, 0, "dwfl_getthreads failed: %s", dwfl_errmsg (-1));
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dwfl_end (dwfl);
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pthread_cancel (thread1);
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pthread_cancel (thread2);
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pthread_join (thread1, NULL);
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pthread_join (thread2, NULL);
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return (threads == 3) ? 0 : -1;
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}
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/* HACK. This is a simple workaround for a combination of old glibc
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and valgrind. libdw will try to dlopen libdebuginfod this causes
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some unsuppressable memory leak warnings when the process is
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multi-threaded under valgrind because of some bad backtraces.
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So simply override dlopen and always return NULL so libdebuginfod
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(and libcurl) are never loaded. This test doesn't rely on
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libdebuginfod anyway. */
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void *dlopen (void)
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{
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return NULL;
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}
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#endif /* __linux__ */
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